Mechanism for transmitting motion



(No Model) B. 0. HOLLAND. MECHANISM FOR TRANSMITTING MOTION.

q vi cweooco UNITED STATES PATENT ,7 OFFICE.

ELIAS CALVIN HOLLAND, OF AUSTIN, ILLINOIS, ASSIGNOR TO THE UNION SPECIALSEWING MACHINE COMPANY, OF CHICAGO, ILLINOIS.

MECHANISM FOR TRANSMITTING MOTION.

SPECIFICATION forming part of Letters Patent No. 583,440, dated May 25,1897.

Application filed January 29, 1895. Renewed March 2, 1897. Serial No.625,803. (No model.)

To aZZ whom it may concern.- Beit known that LELIAS CALVIN HOLLAND, acitizen of the United States, residing at Austin, in the county of Cook,State of Illinois, have invented certain new and useful Improvements inMechanism for Transmitting Motion, of which the following is adescription, reference being had to the accompanying drawings, and tothe letters of reference IO marked thereon.

My invention relates to an improved means or connection for transmittingmotion from a ball-eccentric to a vibrating part, and, while I haveherein shown the invention as applied I 5 to a sewing-machine fortransmitting motion from the main shaft to the looper rocker-shaft forvibrating the latter sidewise, it will be understood that I do notdesire to limit myself to this application to a sewing-machine nor tothe special parts thereof, the invention being designed for use in anymachine where such a construction is desirable. Since the end of theconnection opposite the ball-eccentric is pivoted to the part which itdrives by a ball-stud, said connection must necessarily have anoscillatory motion on the ball-eccentric, this motion being on an axispassing centrally through the eccentric transverse to the shaft. It isextremely undesirable, however, 0 to permit said connection to oscillateon an axis passing through the eccentric and ballstud, since it wouldgive the rod a wabbling motion.

It is the object of my invention, therefore, 3 5 to allow for thenecessary oscillation, but to prevent that which is undesirable, andwhile I am aware that it has been heretofore proposed to provide meansfor accomplishing the above object on a sewing-machine the prescutinvention is designed to obviate certain difficulties existing in suchheretofore proposed means.

The invention consists, primarily, of amain shaft, a ball-eccentricthereon, a strap or collar embracing said ball-eccentric and connectedto the vibrating part, a rocking crank, and a ball connection betweenthe rocking crank and said strap.

Secondly, the invention consists in a main 5o shaft, a ball-eccentricthereon, a strap or collar embracing the same and connected to thevibratin g part, a shaft parallel with the main shaft, a crank sleevedthereon, and a balland-link connection between said crank connection andthe strap or collar.

Finally, the invention consists in the matters hereinafter described,and referred to in the appended claims.

In the accompanying drawings, which illustrate the invention, Figure 1is a side View, partly in section, showing the connection between theball-eccentric on the main shaft and the shaft to be vibrated, togetherwith means for allowing the necessary motion to the connecting-rod. Fig.2 is a plan view, partly in section, illustrating my invention; and Fig.3 is a rear view of the same. Fig. 4 is a detail view of theball-and-stud connection between the link and strap.

In the drawings, A represents the, main 7o shaft, B the ball-eccentricthereon, and a the hub, through which screws pass to secure theeccentric on the shaft, which shaft passes through the opening 00,eccentricall y set. The connection as a whole is shown at D, and cl isthe ball-stud uniting the connecting-rod with the looper-shaft. (Notshown.) The connection or, as it is technically termed, connecting-rod Dis formed in two parts or pieces cf, of semicircular shape, forming asplit ring or collar having a downwardlyprojecting shank with anenlarged head E, in which the ball-stud d is pivoted. The two parts 6 fof the collar are united by screws g, the inner faces of said parts 6 fbeing concaved to conform to theconvex periphery of the ball-eccentric.

Since the end of the connecting-rod opposite the ball-eccentric ispivoted to the looper-shaft by a ball-stud, said rod must have anoscilla- 9o tory motion on the ball-eccentric on any axis, passingcentrally through the eccentric parallel to the looper-shaft andvertical to the driving-shaft and also on any axis parallel to thedriving-shaft and vertical to the looper-shaft. 5 In order to allow forthis movement, but to prevent motion on an axis vertical to both drivingand looper shafts which would cause wabbling of the connecting-rod, Iprovide the following construction: On an axis parallel with the mainshaft, but below the plane thereof, is a second shaft F, which has arocking movement. Sleeved on this shaft F between the two collars G H,which prevent lateral displacement, is a crank I, having anupwardly-extendin g arm K,form ed with a sleeve on its upper end,through which passes a bolt or stud it. One end of a link L embracesthis stud, being held in position by the nut 2' on the bolt, while theother end of said link embraces the collar 19, formed with a socketreceiving a ball 7.3, formed with the screw-stud Z, screwed into therearwardly-extending lug N of the strap or collar D and held by the nut0. The sides of the link are caused to embrace the stud and ball bymeans of the screw 72, which acts to hold the sides of said linktogether.

In the rotation of the main shaft and balleccentric by reason of theball-stud connection with the vibratinglooper-shaft there will be atendency to swing the strap or collar on its axis, but by reason of therocking crank and ball-and-link connection between said crank and thestrap or collar the collar will swing on the axis, passing through theeccentric transverse to the shaft, but will prevent any oscillation onan axis through the center of the eccentric and the ball-stud.

Having thus described my invention, what Iclaim as new, and desire tosecure by Letters Patent, is

1. In combination with a driving-shaft and a part to be-vibrated, meansfor transmitting motion from said driving-shaft to the vibrating partcomprising a ball-eccentric on said driving-shaft, a strap or collarembracing the same and connected to the vibrating part, a rocking crank,and a universal-joint connection between said rocking crank and thestrap or collar; substantially as described.

2. The combination with the main shaft provided with a ball-eccentricand a strap or collar embracing the same, of a vibrating part andconnections between said strap or collar and the vibrating part, ashaft, a crank thereon, and a universal-joint connection between saidcrank and the strap or collar; substantially as described.

3. The combination with the shaft and the eccentric thereon, a strap orcollar embracing the same and a part to be vibrated, of an oscillatingconnection between said strap or collar and the part to be vibrated, arocking crank and a free-joint connection between said rocking crank andthe strap or collar; substantially as described.

l. As a means for transmitting motion in combination with thedriving-shaft and a part to be driven, an eccentric on saiddriving-shaft, a strap or collar embracing the same, a balljointconnection between said strap or collar and the part to be driven, arocking crank, a stud on said strap or collar provided with a ball and alink connection between said rocking crank and the ball; substantiallyas described.

5. The driving-shaft, a part to be driven, the eccentric on saiddriving-shaft and the oscillating connection between said eccentric andthe part to bedriven, a shaft, a crank sleeved thereon having anupwardly-extending portion, a stud passing through said upper portion, alink fixed at one end to said stud, a ball-stud upon the strap or collarto which the opposite end of said link is secured; substantially asdescribed.

6. In the herein-described mechanism, the driving-shaft, the sphericaleccentric thereon, the concaved strap embracing the same and provided onits rear portion with a lug, a ballstud secured to said lug, a linkprovided with a socket for the reception of said ball, and a rockingcrank to which the opposite end of said link is fixed substantially asdescribed.

In testimony whereof I aflix my signature in presence of two witnesses.

ELIAS CALVIN HOLLAND.

lVitnesses:

PHEBE FANNING, CHESTER McNEIL.

